Window-ventilator.



No. 884,598. PATENTED APR. 14, 1908. L. s. MARTIN. WINDOW VENTILATOR., APPLICATIQN FILED MAY 31, 1907.

In: NORRIS PETERS 00,-, WASHINGTON. n. c.

UNITED STATES RAE-TENT OFFIDE.

LOUIS S. MARTIN, OF ERIE, PENNSYLVANIA.

WINDOW-VENTILATOR.

To all whom it may concern:

Be it known that I, Louis S. MARTIN, a

, citizen of the United States, residing at Eric,

in the county of Erie and State of Penn sylvania, have invented certain new and useful Improvements in IVindow-Ventilators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention relates to window ventilators, and has for its object the construction of a ventilator mechanism adapted to be placed in a window sash, and adapted to be adjusted as desired, and also provided with automatic mechanism for preventing strong currents of air passing through the ventilator.

The features of my invention are hereinafter set forth and explained, and illustrated in the accompanying drawings in which:

Figure 1 is a longitudinal section. of a window ventilator embodying my invention, on the line xa: in Fig. 3.- Fig. 2 is a transverse section of the same on the line y@ in Fig.1. Fig. 3 is a'transverse section of the same on the line zz in Fig. 1.

In these drawings A is the rail of an ordinary window-sash, through whichI make a mortise or opening A. In the outside of this opening A I secure a metal frame B, provided on its outside with a screen O, and having pivoted therein vanes D D which are normally held at such an angle to the horizontal, that a strong draft of air through the screen C will operate to close them, and when this strong draft ceases they will resume their normal positions. I accomplish this result by placing the pivots d of the vanes D D at one side of the centers thereof and then counterbalancing the narrower edges thereof, and providing stops (1 with which the wider edges of the vanes contact so that they normally stand at approxi mately an angle of say thirty degrees to a horizontal line, so that a blast of air striking the vanes D D operates to turn the wider edges thereof downward, as illustrated by Specification of Letters Patent.

Application filed. May 31, 1907.

Patented April 14, 1908.

Serial No. 376,665.

dotted lines in Fig. 3, and thereby close the greater portion of the opening A so long as such blast of air continues.

On the o posite side of the sash A, I socure a meta case E which is open, at the top and provided with a screen E. The lower part c of the case I preferably make circular, and in the ends of the case E, I pivot a circular closure plate F adapted to be turned so as to close the screened opening in the top of the case E as illustrated by dotted lines in Fig. 3. This plate F is provided at its ends with arms ff and also near one end with an arm the arms f and f forming the axes on which the plate F is rotated, the arm f being provided with a pivot g'pivoted in the end of the case E. Through the arm f I preferably make a square opening f through which a rod H extends provided with a squared. part it where it passes through the arm f, said rod being also provided with a ratchet disk I'I adapted to engage a ratchet tooth e on the inside of the end of the case E. This rod H extends outwardly through a pivoted opening in the end of the case E and is provided with a handle H and. also extends inwardly from the squared. portion thereof and has its inner end pivoted in the arm f-, and between the squared portion 71 and said arm f 2 there is a spiral spring G which operates against the squared portion lb of the rod to normally retain the ratchet disk II in contact with the ratchet tooth e so that the closure )late F can be held at any point of closure t esired. In operation, by pushing slightly inward on the handle H the closure late can be rotated so as to partially or ful y close the opening at the top of the case A, or partially or fully open it as desired.

In these drawings I have shown a convenient form of ratchet mechanism for operating the closure plate F, but it is obvious that the construction, of this mechanism can be considerably modified without departing from the spirit of my invention,

Therefore what I claim as new and desire to secure by Letters-Patent is:

The combination in a window-sash ventilator, of a case covering a rectangular opening throu h a sash, mechanism in said case for partially or wholly closing said 0 ening, vanes longitudinally pivoted in the sas 1 opening at one side of the center of said vanes, and stops engaging said vanes and normally retaining them at such an angle that they offer substantially no obstruction to the passage of air, and so that a blast of air through said operliing will close them, substantially as set fort 1.

In testimony whereof I aHiX my signature, in presence of two Witnesses.

LOUIS S. MARTIN.

l/Vitnesses:

H. NLSTURGEON, H. J. OURTZE. 

